Anatomy Of The Eye Sclera

These muscles pull on the sclera causing the eye to look left or right up or down and diagonally. The sclera has received its name from its extreme density and hardness.

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Anatomy of the eye.

Anatomy of the eye sclera. The corneas middle layer. Anteriorly it begins at the limbus and terminates at the optic nerve canal. It consists of lamellae collagen and cells and makes up most of the cornea.

The sclera is an opaque white outer layer that surrounds the posterior five-sixths of the eyeball. Introduction Gross anatomy Layers Blood supply drainage and nerve supply. The sclera is pierced by numerous nerves and blood vessels.

Just like an eggshell surrounds an egg and gives an egg its shape the sclera surrounds the eye and gives the eye its shape. The eye itself is coated with three layers. Protects intraocular components from trauma light and mechanical displacement 2.

This sclera in the anterior side extends as a transparent epithelium called the cornea. The largest of these holes is that formed by the optic. It continues with duramater and cornea Its whole surface covered by tenons capsule Anteriorly covered by- bulbar conjunctiva Inner.

Dense connective tissue that accounts for five sixths of the outer coat of the eyeball sklera mannix- hard membrane 1. Rod cells are one of the two types of light-sensitive cells in the retina of the eye. The sclera is essentially the continuation backward of the cornea the collagen fibres of the cornea being in effect continuous with those of the sclera.

In the development of the embryo th. The sclera forms the fibrous coat of the eye and has a white opaque appearance due to the dense irregular arrangement of collagen fibrils. It is a firm unyielding membrane serving to maintain the form of the bulb.

It functions to protect the intraocular contents. The junction of cornea and sclera is called the limbus. The term sclera is derived from Greek word scleros meaning hardSclera is an opaque elastic and resilient tissue of the eye.

The eyeball is filled with vitreous humor with the aqueous humor lying in the small anterior chamber of the eye. The sclera from the Greek skleros meaning hard also known as the white of the eye is the opaque fibrous protective outer layer of the eye containing collagen and elastic fiber. Here the outer two-thirds of the sclera.

However the sclera a tough leather-like tissue also extends around the eye. The sclera is thickest posteriorly becoming progressively thinner anteriorly. Layer containing blood vessels that lines the back of the eye and is located between the retina the inner light-sensitive layer and the sclera the outer white eye wall.

It can be compared with an incomplete shell comprising approximately 90 five-sixths of the outer coat of the eye. There are about 125 million rods which are necessary for seeing in dim light. The white part of the eye a tough covering with which the cornea forms the external protective coat of the eye.

The sclera comes to an end anteriorly where it attaches to the limbus of the cornea. The gap between the sclera and the orbitals of the skull is filled with adipose tissue. INTRODUCTION Sclera forms posterior 56th of external tunic connective tissue coat of eyeball.

Anatomy of the Eye. Choroid The choroid coat in the posterior 56th of the globe is loosely joined to the sclera and is honeycombed with blood vessels that provide nourishment to surrounding tissues. It is continuous with the stroma layer.

The sclera is the part of the eye commonly known as the white It forms the supporting wall of the eyeball and is continuous with the clear cornea. In humans and many other animals the whole sclera is white contrasting with the coloured iris but in some other mammals the visible part of the sclera matches the colour of the iris so the white part does not normally show. The outer layer of the eye.

The extraocular muscles attach to the sclera. The sclera and cornea opaque and transparent layer respectively the choroid filled with blood vessels. The sclerahelp 1 also known as the white of the eye or in older literature as the tunica albuginea oculi is the opaque fibrous protective outer layer of the human eye containing mainly collagen and some crucial elastic fiber.

The posterior pole of the sclera is perforated by the optic nerve and this site is marked as the posterior scleral foramen. The sclera is the outermost layer and it gives a definite shape to the eye. The sclera provides protection and serves as an attachment for the extrinsic muscles of the eye.

This is the white of the eye. The sclera is covered by the conjunctiva a. Sclera - American Academy of Ophthalmology The outer layer of the eye.

The sclera is the dense connective tissue of the eyeball that forms the white of the eye. Structure containing muscle and is located behind the iris which focuses the lens. Scleras or sclerae is the fibrous opaque white coat of the eye.

The sclera provides a tough housing for intraocular contents and maintains the shape of the eye. Withstands the considerable expansive force generated by the intraocular pressure maintaining the shape of the globe 3. Provides attachment sites for the extraocular muscles.

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